.navbar-inverse input[type="text"]{
    background: #333;
    border: none;
    color: #999;
}
.navbar-inverse button[type="submit"]{
    background: none;
    border: none;
    color: #999;
}
.navbar-inverse form{
    position: relative;
}
.navbar-inverse .glyphicon-search{
    position: absolute;
    top: 27%;
    right: 30px;
}
/*媒体查询屏幕最小大小为768px时*/
@media screen and (min-width:768px){
    .navbar-inverse .glyphicon-search{
    right: 10px;
    
}
}